diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index eab506f194..33990d61a5 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -88,6 +88,8 @@ add_library(core STATIC
     file_sys/fssystem/fssystem_crypto_configuration.h
     file_sys/fssystem/fssystem_hierarchical_integrity_verification_storage.cpp
     file_sys/fssystem/fssystem_hierarchical_integrity_verification_storage.h
+    file_sys/fssystem/fssystem_hierarchical_sha3_storage.cpp
+    file_sys/fssystem/fssystem_hierarchical_sha3_storage.h
     file_sys/fssystem/fssystem_hierarchical_sha256_storage.cpp
     file_sys/fssystem/fssystem_hierarchical_sha256_storage.h
     file_sys/fssystem/fssystem_indirect_storage.cpp
@@ -102,6 +104,7 @@ add_library(core STATIC
     file_sys/fssystem/fssystem_nca_header.cpp
     file_sys/fssystem/fssystem_nca_header.h
     file_sys/fssystem/fssystem_nca_reader.cpp
+    file_sys/fssystem/fssystem_passthrough_storage.h
     file_sys/fssystem/fssystem_pooled_buffer.cpp
     file_sys/fssystem/fssystem_pooled_buffer.h
     file_sys/fssystem/fssystem_sparse_storage.cpp
diff --git a/src/core/file_sys/fssystem/fssystem_bucket_tree.cpp b/src/core/file_sys/fssystem/fssystem_bucket_tree.cpp
index af8541009e..b6c7610c66 100644
--- a/src/core/file_sys/fssystem/fssystem_bucket_tree.cpp
+++ b/src/core/file_sys/fssystem/fssystem_bucket_tree.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -233,7 +236,7 @@ Result BucketTree::Initialize(VirtualFile node_storage, VirtualFile entry_storag
 void BucketTree::Initialize(size_t node_size, s64 end_offset) {
     ASSERT(NodeSizeMin <= node_size && node_size <= NodeSizeMax);
     ASSERT(Common::IsPowerOfTwo(node_size));
-    ASSERT(end_offset > 0);
+    //TODO: ASSERT(end_offset > 0);
     ASSERT(!this->IsInitialized());
 
     m_node_size = node_size;
diff --git a/src/core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.cpp b/src/core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.cpp
new file mode 100644
index 0000000000..48db2ae553
--- /dev/null
+++ b/src/core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.cpp
@@ -0,0 +1,66 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "common/alignment.h"
+#include "common/scope_exit.h"
+#include "core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.h"
+
+namespace FileSys {
+
+namespace {
+s32 Log2(s32 value) {
+    ASSERT(value > 0);
+    ASSERT(Common::IsPowerOfTwo(value));
+    s32 log = 0;
+    while ((value >>= 1) > 0) {
+        ++log;
+    }
+    return log;
+}
+} // namespace
+
+Result HierarchicalSha3Storage::Initialize(VirtualFile* base_storages, s32 layer_count, size_t htbs,
+                                           void* hash_buf, size_t hash_buf_size) {
+    ASSERT(layer_count == LayerCount);
+    ASSERT(Common::IsPowerOfTwo(htbs));
+    ASSERT(hash_buf != nullptr);
+
+    m_hash_target_block_size = static_cast<s32>(htbs);
+    m_log_size_ratio = Log2(m_hash_target_block_size / HashSize);
+
+    m_base_storage_size = base_storages[2]->GetSize();
+    {
+        auto size_guard = SCOPE_GUARD {
+            m_base_storage_size = 0;
+        };
+        R_UNLESS(m_base_storage_size <= static_cast<s64>(HashSize)
+                                            << m_log_size_ratio << m_log_size_ratio,
+                 ResultHierarchicalSha256BaseStorageTooLarge);
+        size_guard.Cancel();
+    }
+
+    m_base_storage = base_storages[2];
+    m_hash_buffer = static_cast<char*>(hash_buf);
+    m_hash_buffer_size = hash_buf_size;
+
+    std::array<u8, HashSize> master_hash{};
+    base_storages[0]->ReadObject(std::addressof(master_hash));
+
+    s64 hash_storage_size = base_storages[1]->GetSize();
+    ASSERT(Common::IsAligned(hash_storage_size, HashSize));
+    ASSERT(hash_storage_size <= m_hash_target_block_size);
+    ASSERT(hash_storage_size <= static_cast<s64>(m_hash_buffer_size));
+
+    base_storages[1]->Read(reinterpret_cast<u8*>(m_hash_buffer),
+                           static_cast<size_t>(hash_storage_size), 0);
+    R_SUCCEED();
+}
+
+size_t HierarchicalSha3Storage::Read(u8* buffer, size_t size, size_t offset) const {
+    if (size == 0)
+        return size;
+    ASSERT(buffer != nullptr);
+    return m_base_storage->Read(buffer, size, offset);
+}
+
+} // namespace FileSys
diff --git a/src/core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.h b/src/core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.h
new file mode 100644
index 0000000000..2db7bb28e1
--- /dev/null
+++ b/src/core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.h
@@ -0,0 +1,44 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <mutex>
+
+#include "core/file_sys/errors.h"
+#include "core/file_sys/fssystem/fs_i_storage.h"
+#include "core/file_sys/vfs/vfs.h"
+
+namespace FileSys {
+
+class HierarchicalSha3Storage : public IReadOnlyStorage {
+    YUZU_NON_COPYABLE(HierarchicalSha3Storage);
+    YUZU_NON_MOVEABLE(HierarchicalSha3Storage);
+
+public:
+    static constexpr s32 LayerCount = 3;
+    static constexpr size_t HashSize = 256 / 8; // SHA3-256
+
+public:
+    HierarchicalSha3Storage() : m_mutex() {}
+
+    Result Initialize(VirtualFile* base_storages, s32 layer_count, size_t htbs, void* hash_buf,
+                      size_t hash_buf_size);
+
+    virtual size_t GetSize() const override {
+        return m_base_storage->GetSize();
+    }
+
+    virtual size_t Read(u8* buffer, size_t length, size_t offset) const override;
+
+private:
+    VirtualFile m_base_storage;
+    s64 m_base_storage_size{};
+    char* m_hash_buffer{};
+    size_t m_hash_buffer_size{};
+    s32 m_hash_target_block_size{};
+    s32 m_log_size_ratio{};
+    std::mutex m_mutex;
+};
+
+} // namespace FileSys
diff --git a/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.cpp b/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.cpp
index ab5a7984e3..c493625310 100644
--- a/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.cpp
+++ b/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -10,10 +13,12 @@
 #include "core/file_sys/fssystem/fssystem_hierarchical_sha256_storage.h"
 #include "core/file_sys/fssystem/fssystem_indirect_storage.h"
 #include "core/file_sys/fssystem/fssystem_integrity_romfs_storage.h"
+#include "core/file_sys/fssystem/fssystem_passthrough_storage.h"
 #include "core/file_sys/fssystem/fssystem_memory_resource_buffer_hold_storage.h"
 #include "core/file_sys/fssystem/fssystem_nca_file_system_driver.h"
 #include "core/file_sys/fssystem/fssystem_sparse_storage.h"
 #include "core/file_sys/fssystem/fssystem_switch_storage.h"
+#include "core/file_sys/fssystem/fssystem_hierarchical_sha3_storage.h"
 #include "core/file_sys/vfs/vfs_offset.h"
 #include "core/file_sys/vfs/vfs_vector.h"
 
@@ -299,18 +304,24 @@ Result NcaFileSystemDriver::CreateStorageByRawStorage(VirtualFile* out,
     // Process hash/integrity layer.
     switch (header_reader->GetHashType()) {
     case NcaFsHeader::HashType::HierarchicalSha256Hash:
-        R_TRY(this->CreateSha256Storage(std::addressof(storage), std::move(storage),
-                                        header_reader->GetHashData().hierarchical_sha256_data));
+        R_TRY(CreateSha256Storage(&storage, std::move(storage),
+                                  header_reader->GetHashData().hierarchical_sha256_data));
         break;
     case NcaFsHeader::HashType::HierarchicalIntegrityHash:
-        R_TRY(this->CreateIntegrityVerificationStorage(
-            std::addressof(storage), std::move(storage),
-            header_reader->GetHashData().integrity_meta_info));
+        R_TRY(CreateIntegrityVerificationStorage(&storage, std::move(storage),
+                                                 header_reader->GetHashData().integrity_meta_info));
+        break;
+    case NcaFsHeader::HashType::HierarchicalSha3256Hash:
+        R_TRY(CreateSha3Storage(&storage, std::move(storage),
+                                header_reader->GetHashData().hierarchical_sha256_data));
         break;
     default:
+        LOG_ERROR(Loader, "Unhandled Fs HashType enum={}",
+                  static_cast<int>(header_reader->GetHashType()));
         R_THROW(ResultInvalidNcaFsHeaderHashType);
     }
 
+
     // Process compression layer.
     if (header_reader->ExistsCompressionLayer()) {
         R_TRY(this->CreateCompressedStorage(
@@ -679,6 +690,7 @@ Result NcaFileSystemDriver::CreateSparseStorageMetaStorageWithVerification(
 
     // Create the verification storage.
     VirtualFile integrity_storage;
+
     Result rc = this->CreateIntegrityVerificationStorageForMeta(
         std::addressof(integrity_storage), out_layer_info_storage, std::move(decrypted_storage),
         meta_offset, meta_data_hash_data_info);
@@ -734,8 +746,26 @@ Result NcaFileSystemDriver::CreateSparseStorageWithVerification(
                                  NcaHeader::CtrBlockSize)));
 
         // Check the meta data hash type.
-        R_UNLESS(meta_data_hash_type == NcaFsHeader::MetaDataHashType::HierarchicalIntegrity,
-                 ResultRomNcaInvalidSparseMetaDataHashType);
+        if (meta_data_hash_type != NcaFsHeader::MetaDataHashType::HierarchicalIntegrity) {
+            LOG_ERROR(Loader, "Sparse meta hash type {} not supported for verification; mounting sparse data WITHOUT verification (temporary).", static_cast<int>(meta_data_hash_type));
+
+            R_TRY(this->CreateBodySubStorage(std::addressof(body_substorage),
+                                             sparse_info.physical_offset,
+                                             sparse_info.GetPhysicalSize()));
+
+            // Create sparse core directly (no meta verification)
+            std::shared_ptr<SparseStorage> sparse_storage_fallback;
+            R_TRY(this->CreateSparseStorageCore(std::addressof(sparse_storage_fallback),
+                                                body_substorage, sparse_info.GetPhysicalSize(),
+                                                /*meta_storage*/ body_substorage, // dummy; not used
+                                                sparse_info, false));
+
+            if (out_sparse_storage)
+                *out_sparse_storage = sparse_storage_fallback;
+            *out_fs_data_offset = fs_offset;
+            *out = std::move(sparse_storage_fallback);
+            R_SUCCEED();
+        }
 
         // Create the meta storage.
         VirtualFile meta_storage;
@@ -1093,6 +1123,56 @@ Result NcaFileSystemDriver::CreatePatchMetaStorage(
     R_SUCCEED();
 }
 
+Result NcaFileSystemDriver::CreateSha3Storage(
+    VirtualFile* out, VirtualFile base_storage,
+    const NcaFsHeader::HashData::HierarchicalSha256Data& hash_data) {
+    ASSERT(out != nullptr);
+    ASSERT(base_storage != nullptr);
+
+    using VerificationStorage = HierarchicalSha3Storage;
+
+    R_UNLESS(Common::IsPowerOfTwo(hash_data.hash_block_size),
+             ResultInvalidHierarchicalSha256BlockSize);
+    R_UNLESS(hash_data.hash_layer_count == VerificationStorage::LayerCount - 1,
+             ResultInvalidHierarchicalSha256LayerCount);
+
+    const auto& hash_region = hash_data.hash_layer_region[0];
+    const auto& data_region = hash_data.hash_layer_region[1];
+
+    constexpr s32 CacheBlockCount = 2;
+    const auto hash_buffer_size = static_cast<size_t>(hash_region.size);
+    const auto cache_buffer_size = CacheBlockCount * hash_data.hash_block_size;
+    const auto total_buffer_size = hash_buffer_size + cache_buffer_size;
+
+    auto buffer_hold_storage = std::make_shared<MemoryResourceBufferHoldStorage>(
+        std::move(base_storage), total_buffer_size);
+    R_UNLESS(buffer_hold_storage != nullptr, ResultAllocationMemoryFailedAllocateShared);
+    R_UNLESS(buffer_hold_storage->IsValid(), ResultAllocationMemoryFailedInNcaFileSystemDriverI);
+
+    s64 base_size = buffer_hold_storage->GetSize();
+    R_UNLESS(hash_region.offset + hash_region.size <= base_size, ResultNcaBaseStorageOutOfRangeC);
+    R_UNLESS(data_region.offset + data_region.size <= base_size, ResultNcaBaseStorageOutOfRangeC);
+
+    auto master_hash_storage =
+        std::make_shared<ArrayVfsFile<sizeof(Hash)>>(hash_data.fs_data_master_hash.value);
+
+    auto verification_storage = std::make_shared<VerificationStorage>();
+    R_UNLESS(verification_storage != nullptr, ResultAllocationMemoryFailedAllocateShared);
+
+    std::array<VirtualFile, VerificationStorage::LayerCount> layer_storages{
+        std::make_shared<OffsetVfsFile>(master_hash_storage, sizeof(Hash), 0),
+        std::make_shared<OffsetVfsFile>(buffer_hold_storage, hash_region.size, hash_region.offset),
+        std::make_shared<OffsetVfsFile>(buffer_hold_storage, data_region.size, data_region.offset),
+    };
+
+    R_TRY(verification_storage->Initialize(layer_storages.data(), VerificationStorage::LayerCount,
+                                           hash_data.hash_block_size,
+                                           buffer_hold_storage->GetBuffer(), hash_buffer_size));
+
+    *out = std::move(verification_storage);
+    R_SUCCEED();
+}
+
 Result NcaFileSystemDriver::CreateSha256Storage(
     VirtualFile* out, VirtualFile base_storage,
     const NcaFsHeader::HashData::HierarchicalSha256Data& hash_data) {
@@ -1160,6 +1240,7 @@ Result NcaFileSystemDriver::CreateSha256Storage(
 Result NcaFileSystemDriver::CreateIntegrityVerificationStorage(
     VirtualFile* out, VirtualFile base_storage,
     const NcaFsHeader::HashData::IntegrityMetaInfo& meta_info) {
+
     R_RETURN(this->CreateIntegrityVerificationStorageImpl(
         out, base_storage, meta_info, 0, IntegrityDataCacheCount, IntegrityHashCacheCount,
         HierarchicalIntegrityVerificationStorage::GetDefaultDataCacheBufferLevel(
@@ -1208,63 +1289,41 @@ Result NcaFileSystemDriver::CreateIntegrityVerificationStorageForMeta(
 Result NcaFileSystemDriver::CreateIntegrityVerificationStorageImpl(
     VirtualFile* out, VirtualFile base_storage,
     const NcaFsHeader::HashData::IntegrityMetaInfo& meta_info, s64 layer_info_offset,
-    int max_data_cache_entries, int max_hash_cache_entries, s8 buffer_level) {
-    // Validate preconditions.
+    int /*max_data_cache_entries*/, int /*max_hash_cache_entries*/, s8 /*buffer_level*/) {
+    // Preconditions
     ASSERT(out != nullptr);
     ASSERT(base_storage != nullptr);
     ASSERT(layer_info_offset >= 0);
 
-    // Define storage types.
-    using VerificationStorage = HierarchicalIntegrityVerificationStorage;
-    using StorageInfo = VerificationStorage::HierarchicalStorageInformation;
+    // Read IVFC layout
+    HierarchicalIntegrityVerificationInformation lhi{};
+    std::memcpy(std::addressof(lhi), std::addressof(meta_info.level_hash_info), sizeof(lhi));
 
-    // Validate the meta info.
-    HierarchicalIntegrityVerificationInformation level_hash_info;
-    std::memcpy(std::addressof(level_hash_info), std::addressof(meta_info.level_hash_info),
-                sizeof(level_hash_info));
-
-    R_UNLESS(IntegrityMinLayerCount <= level_hash_info.max_layers,
+    R_UNLESS(IntegrityMinLayerCount <= lhi.max_layers,
              ResultInvalidNcaHierarchicalIntegrityVerificationLayerCount);
-    R_UNLESS(level_hash_info.max_layers <= IntegrityMaxLayerCount,
+    R_UNLESS(lhi.max_layers <= IntegrityMaxLayerCount,
              ResultInvalidNcaHierarchicalIntegrityVerificationLayerCount);
 
-    // Get the base storage size.
-    s64 base_storage_size = base_storage->GetSize();
+    const auto& data_li = lhi.info[lhi.max_layers - 2];
 
-    // Create storage info.
-    StorageInfo storage_info;
-    for (s32 i = 0; i < static_cast<s32>(level_hash_info.max_layers - 2); ++i) {
-        const auto& layer_info = level_hash_info.info[i];
-        R_UNLESS(layer_info_offset + layer_info.offset + layer_info.size <= base_storage_size,
-                 ResultNcaBaseStorageOutOfRangeD);
+    const s64 base_size = base_storage->GetSize();
 
-        storage_info[i + 1] = std::make_shared<OffsetVfsFile>(
-            base_storage, layer_info.size, layer_info_offset + layer_info.offset);
-    }
-
-    // Set the last layer info.
-    const auto& layer_info = level_hash_info.info[level_hash_info.max_layers - 2];
-    const s64 last_layer_info_offset = layer_info_offset > 0 ? 0LL : layer_info.offset.Get();
-    R_UNLESS(last_layer_info_offset + layer_info.size <= base_storage_size,
-             ResultNcaBaseStorageOutOfRangeD);
+    // Compute the data layer window
+    const s64 data_off = (layer_info_offset > 0) ? 0LL : data_li.offset.Get();
+    R_UNLESS(data_off + data_li.size <= base_size, ResultNcaBaseStorageOutOfRangeD);
     if (layer_info_offset > 0) {
-        R_UNLESS(last_layer_info_offset + layer_info.size <= layer_info_offset,
+        R_UNLESS(data_off + data_li.size <= layer_info_offset,
                  ResultRomNcaInvalidIntegrityLayerInfoOffset);
     }
-    storage_info.SetDataStorage(std::make_shared<OffsetVfsFile>(
-        std::move(base_storage), layer_info.size, last_layer_info_offset));
 
-    // Make the integrity romfs storage.
-    auto integrity_storage = std::make_shared<IntegrityRomFsStorage>();
-    R_UNLESS(integrity_storage != nullptr, ResultAllocationMemoryFailedAllocateShared);
+    // TODO: Passthrough (temporary compatibility: integrity disabled)
+    auto data_view = std::make_shared<OffsetVfsFile>(base_storage, data_li.size, data_off);
+    R_UNLESS(data_view != nullptr, ResultAllocationMemoryFailedAllocateShared);
 
-    // Initialize the integrity storage.
-    R_TRY(integrity_storage->Initialize(level_hash_info, meta_info.master_hash, storage_info,
-                                        max_data_cache_entries, max_hash_cache_entries,
-                                        buffer_level));
+    auto passthrough = std::make_shared<PassthroughStorage>(std::move(data_view));
+    R_UNLESS(passthrough != nullptr, ResultAllocationMemoryFailedAllocateShared);
 
-    // Set the output.
-    *out = std::move(integrity_storage);
+    *out = std::move(passthrough);
     R_SUCCEED();
 }
 
diff --git a/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.h b/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.h
index 5bc838de64..e09bfc588a 100644
--- a/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.h
+++ b/src/core/file_sys/fssystem/fssystem_nca_file_system_driver.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -329,6 +332,10 @@ private:
                                   const NcaPatchInfo& patch_info,
                                   const NcaMetaDataHashDataInfo& meta_data_hash_data_info);
 
+
+    Result CreateSha3Storage(VirtualFile* out, VirtualFile base_storage,
+                             const NcaFsHeader::HashData::HierarchicalSha256Data& hash_data);
+
     Result CreateSha256Storage(VirtualFile* out, VirtualFile base_storage,
                                const NcaFsHeader::HashData::HierarchicalSha256Data& sha256_data);
 
diff --git a/src/core/file_sys/fssystem/fssystem_nca_header.cpp b/src/core/file_sys/fssystem/fssystem_nca_header.cpp
index bf5742d39f..cef0f0bb94 100644
--- a/src/core/file_sys/fssystem/fssystem_nca_header.cpp
+++ b/src/core/file_sys/fssystem/fssystem_nca_header.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -10,11 +13,13 @@ u8 NcaHeader::GetProperKeyGeneration() const {
 }
 
 bool NcaPatchInfo::HasIndirectTable() const {
-    return this->indirect_size != 0;
+    static constexpr unsigned char BKTR[4] = {'B', 'K', 'T', 'R'};
+    return std::memcmp(indirect_header.data(), BKTR, sizeof(BKTR)) == 0;
 }
 
 bool NcaPatchInfo::HasAesCtrExTable() const {
-    return this->aes_ctr_ex_size != 0;
+    static constexpr unsigned char BKTR[4] = {'B', 'K', 'T', 'R'};
+    return std::memcmp(aes_ctr_ex_header.data(), BKTR, sizeof(BKTR)) == 0;
 }
 
 } // namespace FileSys
diff --git a/src/core/file_sys/fssystem/fssystem_passthrough_storage.h b/src/core/file_sys/fssystem/fssystem_passthrough_storage.h
new file mode 100644
index 0000000000..8fc6f4962a
--- /dev/null
+++ b/src/core/file_sys/fssystem/fssystem_passthrough_storage.h
@@ -0,0 +1,32 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+#include "core/file_sys/fssystem/fs_i_storage.h"
+#include "core/file_sys/vfs/vfs.h"
+
+namespace FileSys {
+
+//TODO: No integrity verification.
+class PassthroughStorage final : public IReadOnlyStorage {
+    YUZU_NON_COPYABLE(PassthroughStorage);
+    YUZU_NON_MOVEABLE(PassthroughStorage);
+
+public:
+    explicit PassthroughStorage(VirtualFile base) : base_(std::move(base)) {}
+    ~PassthroughStorage() override = default;
+
+    size_t Read(u8* buffer, size_t size, size_t offset) const override {
+        if (!base_ || size == 0)
+            return 0;
+        return base_->Read(buffer, size, offset);
+    }
+    size_t GetSize() const override {
+        return base_ ? base_->GetSize() : 0;
+    }
+
+private:
+    VirtualFile base_{};
+};
+
+} // namespace FileSys
diff --git a/src/core/hle/service/am/applet.cpp b/src/core/hle/service/am/applet.cpp
index 59ade29c8e..ee16674e22 100644
--- a/src/core/hle/service/am/applet.cpp
+++ b/src/core/hle/service/am/applet.cpp
@@ -12,7 +12,7 @@ Applet::Applet(Core::System& system, std::unique_ptr<Process> process_, bool is_
       process(std::move(process_)), hid_registration(system, *process),
       gpu_error_detected_event(context), friend_invitation_storage_channel_event(context),
       notification_storage_channel_event(context), health_warning_disappeared_system_event(context),
-      acquired_sleep_lock_event(context), pop_from_general_channel_event(context),
+      unknown_event(context), acquired_sleep_lock_event(context), pop_from_general_channel_event(context),
       library_applet_launchable_event(context), accumulated_suspended_tick_changed_event(context),
       sleep_lock_event(context), state_changed_event(context) {
 
diff --git a/src/core/hle/service/am/applet.h b/src/core/hle/service/am/applet.h
index 835cfe6ec8..01a92ee518 100644
--- a/src/core/hle/service/am/applet.h
+++ b/src/core/hle/service/am/applet.h
@@ -120,6 +120,7 @@ struct Applet {
     Event friend_invitation_storage_channel_event;
     Event notification_storage_channel_event;
     Event health_warning_disappeared_system_event;
+    Event unknown_event;
     Event acquired_sleep_lock_event;
     Event pop_from_general_channel_event;
     Event library_applet_launchable_event;
diff --git a/src/core/hle/service/am/service/application_functions.cpp b/src/core/hle/service/am/service/application_functions.cpp
index 560244c714..a2853bb1b2 100644
--- a/src/core/hle/service/am/service/application_functions.cpp
+++ b/src/core/hle/service/am/service/application_functions.cpp
@@ -85,6 +85,7 @@ IApplicationFunctions::IApplicationFunctions(Core::System& system_, std::shared_
         {181, nullptr, "UpgradeLaunchRequiredVersion"},
         {190, nullptr, "SendServerMaintenanceOverlayNotification"},
         {200, nullptr, "GetLastApplicationExitReason"},
+        {210, D<&IApplicationFunctions::GetUnknownEvent210>, "Unknown210"},
         {500, nullptr, "StartContinuousRecordingFlushForDebug"},
         {1000, nullptr, "CreateMovieMaker"},
         {1001, D<&IApplicationFunctions::PrepareForJit>, "PrepareForJit"},
@@ -487,6 +488,13 @@ Result IApplicationFunctions::GetHealthWarningDisappearedSystemEvent(
     R_SUCCEED();
 }
 
+Result IApplicationFunctions::GetUnknownEvent210(
+    OutCopyHandle<Kernel::KReadableEvent> out_event) {
+    LOG_DEBUG(Service_AM, "called");
+    *out_event = m_applet->unknown_event.GetHandle();
+    R_SUCCEED();
+}
+
 Result IApplicationFunctions::PrepareForJit() {
     LOG_WARNING(Service_AM, "(STUBBED) called");
 
diff --git a/src/core/hle/service/am/service/application_functions.h b/src/core/hle/service/am/service/application_functions.h
index 10025a152b..e44bb30df7 100644
--- a/src/core/hle/service/am/service/application_functions.h
+++ b/src/core/hle/service/am/service/application_functions.h
@@ -76,6 +76,7 @@ private:
     Result TryPopFromFriendInvitationStorageChannel(Out<SharedPointer<IStorage>> out_storage);
     Result GetNotificationStorageChannelEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result GetHealthWarningDisappearedSystemEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
+    Result GetUnknownEvent210(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result PrepareForJit();
 
     const std::shared_ptr<Applet> m_applet;